SCore Live
SCore Live 23
Document generated: 20.09.13
3.4 audio Clock Card (Ext. Sync Card)
A943.0331
The SCore Ext. Sync card acts as a connector panel for audio clock syn-
chronization inputs and outputs. Three inputs (
VIDEO IN
,
WCLK IN
, and
AES
SYNC IN
) can be used; their signals are sent to the SCore Live sync bus on the
backplane. While the video sync is separated on the card, the other signals
are just driven onto the bus. A green LED indicates that the applied external
sync is used by the system. The system clocks can be used from the
WCLK
OUT
and
AES 3x OUT
outputs.
Important
If the system is using MADI links, the deviation of the external sync signal
from the nominal clock frequency
must not exceed ±100 ppm
.
If no MADI
links are used, a deviation of ±2500 ppm is tolerated.
Sync Priority
The sync source is automatically selected according to the following table:
Clock Source
Priority
Video
1
AES/EBU
2
Wordclock
3
Internal
4
Current consumption (5 V)
approx. 100 mA
Operating temperature
0...40° C
Backplane
SCORE LIVE
Sync Bus
Video Ref.
Input
SCORE LIVE/PRO EXT SYNC CARD A943.0331
Video
Sync
Separator
WCLK In
AES/EBU In
AES/EBU
Out1
AES/EBU
Out2
AES/EBU
Out3
WCLK Out
EXT LOCK
LED
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